Abstract: The present invention relates to novel 23-imino derivatives of LL-F28249.alpha., .beta., .gamma., .delta., .epsilon., .zeta., .theta., .iota., and .lambda. compounds. These LL-F28249 compounds (collectively) are isolates from the fermentation broth of Streptomyces cyaneogrisesu subspecies noncyanogenus having deposit accession number NRRL 15773. The precursor 23-oxo compounds are prepared by selectively oxidizing suitably protected 23-hydroxy compounds of LL-F28249 components using oxidizing agents. Subsequently, the 23-oxo compounds are converted to the 23-imino compounds. These novel compounds have potent anthelmintic, insecticidal, ectoparasiticidal, nematicidal and acaricidal activity. Compositions containing these 23-oxo and 23-imino derivatives of LL-F28249 also are described herein.

Abstract: The present invention relates to novel 23-imino derivatives of the compounds collectively referred to as 23-keto C-076 compounds. The C-076 compounds (collectively) are isolates from the fermentation broth of Streptomyces avermitilis. These novel compounds have potent anthelmintic, insecticidal, ectoparasiticidal, nematicidal and acaricidal activity. Compositions containing these 23-imino derivatives of 23-keto C-076 also are described herein.

Abstract: The present invention relates to novel 23-imino derivatives of C-076 wherein the C-076 compounds are not substituted at the 13-position. The C-076 compounds (collectively) are isolates from the fermentation broth of Streptomyces avermitilis. The precursor 23-oxo compounds are prepared by selectively oxidizing suitably protected 13-deoxy C-076 aglycone compounds by using oxidizing agents. Subsequently, the 23-oxo compounds are converted to the 23-imino compounds. These novel compounds have potent anthelmintic, insecticidal, ectoparasticidal, nematicidal and acaricidal activity. Compositions containing these 23-oxo and 23-imino derivatives of 13-deoxy C-076 aglycones also are described herein.

Abstract: The present invention relates to novel 23-imino derivatives of the compounds collectively referred to as 23-keto C-076 compounds. The C-076 compounds (collectively) are isolates from the fermentation broth of Streptomyces avermitilis. These novel compounds have potent anthelmintic, insecticidal, ectoparasiticidal, nematicidal and acaricidal activity. Compositions containing these 23-imino derivatives of 23-keto C-076 also are described herein.